Facile construction of highly functionalized 2-pyrrolines via FeCl3-catalyzed reaction of aziridines with arylalkynes
作者:Jinmin Fan、Linfeng Gao、Zhiyong Wang
DOI:10.1039/b910408a
日期:——
A series of highly functionalized 2-pyrrolines have been constructed by using a novel FeCl(3)-catalyzed reaction of aziridines with arylalkynes, in which an aryl-substituted alkenyl cation is involved.
Ring-opening formal hetero-[5+2] cycloaddition of 1-tosyl-2,3-dihydro-1<i>H</i>-pyrroles with terminal alkynes: entry to 1-tosyl-2,3-dihydro 2,3-dihydro-1<i>H</i>-azepines
作者:Ming-Bo Zhou、Rui Pi、Fan Teng、Yang Li、Jin-Heng Li
DOI:10.1039/c9cc05082e
日期:——
A new Lewis acid catalysed formal hetero-[5+2] cycloaddition of 2,3-dihydro-1H-pyrroles to terminal alkynes is described. By employing a FeCl3 and BF3·OEt2 co-catalytic strategy, the ring-opening of 1-tosyl-2,3-dihydro-1H-pyrroles by selectivecleavage of the C(sp2)–N bond and subsequent annulation have been achieved to access 1-tosyl-2,3-dihydro-1H-azepines with excellent regioselectivity, offering
Visible-Light-Promoted Click [3+2] Cycloaddition of Aziridine with Alkyne: An Efficient Synthesis of Dihydropyrrolidine
作者:Ritu Kapoor、I. R. Siddiqui、Ruchi Chawla、Ankit Verma、Twinkle Keshari
DOI:10.1055/a-2099-6309
日期:2023.8
A photocatalytic [3+2] cycloaddition of aziridines with activated alkynes is reported under visible-light irradiation in the presence of ruthenium catalyst. This chemical transformation provides polysubstituted pyrrolidines in good yields based on the click chemistry philosophy. The reaction successfully represents a primary trial of cyclocarboamination through photocascade catalysis combining energy
Synthesis of Azepine Derivatives by Silver-Catalyzed [5+2] Cycloaddition of<i>γ</i>-Amino Ketones with Alkynes
作者:Ming-Bo Zhou、Ren-Jie Song、Cheng-Yong Wang、Jin-Heng Li
DOI:10.1002/anie.201304902
日期:2013.10.4
Silver forges the ring: A new and practical silver‐catalyzed [5+2] cycloaddition method has been developed for the synthesis of azepines through the formation of four new chemical bonds between a γ‐amino ketone and an alkyne in one step. This method provides a new hetero‐[5+2] cycloaddition strategy for the construction of seven‐membered ring systems.